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12-19-2005, 02:14 PM
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Hard Knock At Cold Start
When it is around 30 outside and my truck is not plugged in when it starts its sounds like its knocking but it only does it for a min or 2. when i plug it in and it gets real low around 15 or less it does it. I had a 7.3 and it never made the sounds this thing does. When it is warmed up it runs great like nothing is bad. Does anyone else have this problem or just me.
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12-19-2005, 07:56 PM
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It's probably normal. My 7.3 is a lot louder at idle or throttle when the engine is cold....and I mean like 10 degrees cold!
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12-20-2005, 03:41 PM
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I hope it is. I have no warrntey left on it.
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12-20-2005, 04:21 PM
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Yeah you should be pretty safe. My buddy's 03 cummins makes some terrible noises when it is cold, but once it warms up it runs normal.
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12-20-2005, 05:20 PM
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don't worry about the knocking...it gets cold here in NJ, and mine knocks if it isn't plugged in, or if it's really cold...i usually run the glow plugs two or three times two...let me do a sound transposition for everyone's benefit...
...chunnana...chunnana...chunnana..chunnana...chun nanachunnanachunnana...chunachunachunachuna....wam wam wam....wogga wogga wogga... happy starting! wes
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12-21-2005, 07:50 AM
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Quote:
 Double dang, sounds just like my engine. You sure you didn't sneak past my house the other morning with a tape recorder? Larry
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12-21-2005, 08:21 AM
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Yep, they said it, the cold just makes it sound like that. Two winters ago, it was 6 below or less here for two solid weeks and I never started my truck. It dawned on me one crisp evening that I should probobly run that thing for a while or else risk not running it at all the rest of the winter. Yes, it was plugged in, but that temp gauge did NOT show any heat in the block cause it was a cold one! I really expected for this thing not to start, but three turn-overs later...
CRACK...CRACK..CRACK.CRACK...chugga, chugga, chugga...she was firing so hard that the truck was shaking side to side, but she ran! After the pistons hit extra hard a few times, it smoothed right out and ran like it was 70 outside. Have to admit I was shocked cause even the neighbour, who was driving his truck every day could not get it to start. Although, it was a Duramax, so maybe that is why?  Yeah, dont worry much about it, the rough start is common in the winter, plugged in or not. ~Turbotime
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12-21-2005, 02:09 PM
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Mine never shows anything on the guage when it's plugged in either, but you can tell the difference when you turn the key and the starter has an easier time turning over.
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06-19-2008, 08:09 PM
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my 05 was doing the same thing about a year ago, and a re-flash on the computer took care of the problem
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